U.S. patent application number 17/509075 was filed with the patent office on 2022-02-24 for connecting joint.
The applicant listed for this patent is RIFENG ENTERPRISE (FOSHAN) CO., LTD., RIFENG ENTERPRISE GROUP CO., LTD., RIFENG TECHNOLOGY CO., LTD.. Invention is credited to Huijian Cao, Shuohao Chen, Jiajia Cheng, Zhenbin Diao, Xiyong Lin.
Application Number | 20220057036 17/509075 |
Document ID | / |
Family ID | |
Filed Date | 2022-02-24 |
United States Patent
Application |
20220057036 |
Kind Code |
A1 |
Cao; Huijian ; et
al. |
February 24, 2022 |
CONNECTING JOINT
Abstract
A connecting joint includes a connecting tube and a first
compression sleeve. The connecting tube includes a first tube
connecting section for connecting a first tube and a second tube
connecting section for connecting a second tube. The first tube
connecting section and the second tube connecting section are
communicated and an annular connecting plate is arranged
therebetween. The first compression sleeve is sleeved on the second
tube connecting section. A first insertion hole is formed between
an inner wall of the first compression sleeve and an outer wall of
the second tube connecting section. A first annular groove is
formed in an outer surface of one end of the second tube connecting
section. An end portion of one end of the first compression sleeve
close to the annular connecting plate is bent toward the second
tube connecting section and inserted into the first annular
groove.
Inventors: |
Cao; Huijian; (Foshan,
CN) ; Diao; Zhenbin; (Foshan, CN) ; Lin;
Xiyong; (Foshan, CN) ; Cheng; Jiajia; (Foshan,
CN) ; Chen; Shuohao; (Foshan, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
RIFENG ENTERPRISE (FOSHAN) CO., LTD.
RIFENG ENTERPRISE GROUP CO., LTD.
RIFENG TECHNOLOGY CO., LTD. |
Foshan
Foshan
Foshan |
|
CN
CN
CN |
|
|
Appl. No.: |
17/509075 |
Filed: |
October 25, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/CN2020/085700 |
Apr 20, 2020 |
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17509075 |
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International
Class: |
F16L 47/12 20060101
F16L047/12; F16L 47/24 20060101 F16L047/24 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 24, 2019 |
CN |
201920574001.5 |
Claims
1. A connecting joint, comprising a connecting tube (1) and a first
compression sleeve (2), wherein the connecting tube (1) comprises a
first tube connecting section (12) for connecting a first tube (4)
and a second tube connecting section (11) for connecting a second
tube (3), the first tube connecting section (12) and the second
tube connecting section (11) are communicated and an annular
connecting plate (13) is arranged therebetween, the first
compression sleeve (2) is sleeved on the second tube connecting
section (11), a first insertion hole (6) with an annular
cross-section for the second tube (3) to be inserted into is formed
between an inner wall of the first compression sleeve (2) and an
outer wall of the second tube connecting section (11), a first
annular groove (111) is formed in an outer surface of one end of
the second tube connecting section (11) close to the annular
connecting plate (13), and an end portion of one end of the first
compression sleeve (2) close to the annular connecting plate (13)
is bent toward the second tube connecting section (11) and inserted
into the first annular groove (111).
2. The connecting joint according to claim 1, wherein a first end
face (131) of the annular connecting plate (13) close to the second
tube connecting section (11) forms at least a part of one side wall
of the first annular groove (111), and the first compression sleeve
(2) is adapted to abut against the first end face (131).
3. The connecting joint according to claim 1, wherein the first
tube connecting section (12) is arranged coaxially with the second
tube connecting section (11).
4. The connecting joint according to claim 3, wherein the first
tube connecting section (12) is hermetically connected with the
second tube connecting section (11) through the annular connecting
plate (13), and the first tube (4) is adapted to be nested in the
first tube connecting section (12).
5. The connecting joint according to claim 4, wherein an inner
diameter of the first tube connecting section (12) is greater than
an inner diameter of the second tube connecting section (11); the
first tube (4) is a metal tube, an end portion of the first tube
(4) extending into the first tube connecting section (12) abuts
against the annular connecting plate (13), and the first tube (4)
is welded with the first tube connecting section (12); and the
second tube (3) is a plastic tube.
6. The connecting joint according to claim 1, wherein the first
tube (4) is a metal tube, and the second tube (3) is a plastic
tube.
7. The connecting joint according to claim 1, wherein the first
compression sleeve (2) is a metal part.
8. The connecting joint according to claim 1, wherein a chamfer
(112) is formed in an outer surface of an end portion of one end of
the first compression sleeve (2) deviating from the annular
connecting plate (13).
9. The connecting joint according to claim 1, wherein a convex
tooth (113) is formed in an outer surface of the second tube
connecting section (11).
10. The connecting joint according to claim 1, wherein an inner
diameter of a middle part of the first compression sleeve (2) is
less than an inner diameter of either end of the first compression
sleeve (2).
11. The connecting joint according to claim 1, wherein an
observation hole (22) is formed in a surface of the end of the
first compression sleeve (2) close to the annular connecting plate
(13).
12. The connecting joint according to claim 11, wherein a plurality
of observation holes (22) are formed, and the plurality of
observation holes (22) are in ring array arrangement in a
circumferential direction of the first compression sleeve (2).
13. The connecting joint according to claim 1, wherein the first
tube connecting section (12), the annular connecting plate (13) and
the second tube connecting section (11) are integrally formed.
14. The connecting joint according to claim 3, further comprising a
second compression sleeve (7), the second compression sleeve (7) is
sleeved on the first tube connecting section (12), a second
insertion hole (8) with an annular cross-section for the first tube
(4) to be inserted into is formed between an inner wall of the
second compression sleeve (7) and an outer wall of the first tube
connecting section (12), a second annular groove (121) is formed in
an outer surface of one end of the first tube connecting section
(12) close to the annular connecting plate (13), and an end portion
of one end of the second compression sleeve (7) close to the
annular connecting plate (13) is bent toward the first tube
connecting section (12) and inserted into the second annular groove
(121).
15. The connecting joint according to claim 14, wherein the first
tube (4) is a plastic tube.
16. The connecting joint according to claim 15, wherein the second
compression sleeve (7) is a metal part.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a Continuation-In-Part
Application of PCT Application No. PCT/CN2020/085700 filed on Apr.
20, 2020, which claims the benefit of Chinese Patent Application
No. 201920574001.5 filed on Apr. 24, 2019. All the above are hereby
incorporated by reference in their entirety.
TECHNICAL FIELD
[0002] The present disclosure relates to the technical field of
tube connection, and in particular, relates to a connecting
joint.
BACKGROUND
[0003] In the prior art, a metal tube is usually welded with one
end of a connecting joint for connection with a plastic tube. A
plastic part detachably connected with the connecting joint is
arranged on the other end of the connecting joint. The connecting
joint is hermetically connected with the plastic tube through the
plastic part. During actual connection, the plastic part is removed
from the connecting joint, and then the metal tube is welded with
one end of the connecting joint. After a welding area is cooled,
the plastic part is installed on the other end of the connecting
joint, and then the plastic tube is connected with the plastic
part, so as to realize connection of the metal tube and the plastic
tube. In such a connection mode, the installation between the
connecting joint and the plastic tube is cumbersome and
time-consuming, resulting in inconvenient construction.
SUMMARY
[0004] The present disclosure provides a connecting joint, which
can simplify the connection of the connecting joint and the tube,
especially the plastic tube, and save installation time and is
convenient to install.
[0005] To achieve the above objectives, the present disclosure
provides a connecting joint, including a connecting tube and a
first compression sleeve. The connecting tube includes a first tube
connecting section for connecting a first tube and a second tube
connecting section for connecting a second tube. The first tube
connecting section and the second tube connecting section are
communicated and an annular connecting plate is arranged
therebetween. The first compression sleeve is sleeved on the second
tube connecting section. A first insertion hole with an annular
cross-section for the second tube to be inserted into is formed
between an inner wall of the first compression sleeve and an outer
wall of the second tube connecting section. A first annular groove
is formed in an outer surface of one end of the second tube
connecting section close to the annular connecting plate. An end
portion of one end of the first compression sleeve close to the
annular connecting plate is bent toward the second tube connecting
section and inserted into the first annular groove.
[0006] As a preferred solution, a first end face of the annular
connecting plate close to the second tube connecting section may
form at least a part of one side wall of the first annular groove,
and the first compression sleeve may be adapted to abut against the
first end face.
[0007] As a preferred solution, the first tube connecting section
may be arranged coaxially with the second tube connecting
section.
[0008] As a preferred solution, the first tube connecting section
may be hermetically connected with the second tube connecting
section through the annular connecting plate, and the first tube
may be adapted to be nested in the first tube connecting
section.
[0009] As a preferred solution, an inner diameter of the first tube
connecting section may be greater than an inner diameter of the
second tube connecting section. The first tube may be a metal tube,
an end portion of the first tube extending into the first tube
connecting section may abut against the annular connecting plate,
and the first tube may be welded with the first tube connecting
section. The second tube may be a plastic tube.
[0010] As a preferred solution, the first tube may be a metal tube,
and the second tube may be a plastic tube.
[0011] As a preferred solution, the first compression sleeve may be
a metal part.
[0012] As a preferred solution, a chamfer may be formed in an outer
surface of an end portion of one end of the first compression
sleeve deviating from the annular connecting plate.
[0013] As a preferred solution, a convex tooth may be formed in an
outer surface of the second tube connecting section.
[0014] As a preferred solution, an inner diameter of a middle part
of the first compression sleeve may be less than an inner diameter
of either end of the first compression sleeve.
[0015] As a preferred solution, an observation hole may be formed
in a surface of the end of the first compression sleeve close to
the annular connecting plate.
[0016] As a preferred solution, a plurality of observation holes
may be formed, and the plurality of observation holes may be in
ring array arrangement in a circumferential direction of the first
compression sleeve.
[0017] As a preferred solution, the first tube connecting section,
the annular connecting plate and the second tube connecting section
may be integrally formed.
[0018] As a preferred solution, the connecting joint may further
include a second compression sleeve. The second compression sleeve
may be sleeved on the first tube connecting section. A second
insertion hole with an annular cross-section for the first tube to
be inserted into may be formed between an inner wall of the second
compression sleeve and an outer wall of the first tube connecting
section. A second annular groove may be formed in an outer surface
of one end of the first tube connecting section close to the
annular connecting plate. An end portion of one end of the second
compression sleeve close to the annular connecting plate may be
bent toward the first tube connecting section and inserted into the
second annular groove.
[0019] As a preferred solution, the first tube may be a plastic
tube.
[0020] As a preferred solution, the second compression sleeve may
be a metal part.
[0021] During actual installation through the connecting joint
provided by the above technical solution, firstly, the first tube
is installed with the first tube connecting section, and then the
second tube is inserted into the first insertion hole with the
annular cross-section formed between the first compression sleeve
and the second tube connecting section. Then, the middle part of
the first compression sleeve is deformed permanently toward the
second tube by a compression tool and the inner wall of the first
compression sleeve is pressed against the outer wall of the second
tube, thereby realizing fixed connection of the first compression
sleeve and the second tube. Since one end of the first compression
sleeve is inserted into the first annular groove, the second tube
connecting section, the second tube and the first compression
sleeve are compressed with each other, thereby realizing relative
fixed connection of the first compression sleeve and the second
tube connecting section, and further realizing the connection of
the first tube and the second tube. Compared with the prior art,
such a connecting joint can simplify the connection of the
connecting joint and the second tube, further simplify the
connection of the first tube and the second tube, and save
installation time and is convenient to install.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a schematic cross-sectional view of a connecting
joint in a first embodiment of the present disclosure;
[0023] FIG. 2 is a schematic cross-sectional view of disassembly of
the connecting joint in the first embodiment of the present
disclosure;
[0024] FIG. 3 is a three-dimensional schematic diagram of
disassembly of the connecting joint in the first embodiment of the
present disclosure;
[0025] FIG. 4 is a cross-sectional view formed after a metal tube
and a plastic tube are inserted into the connecting joint
respectively in the first embodiment of the present disclosure;
[0026] FIG. 5 is a cross-sectional view formed after connection of
the metal tube and the plastic tube in the first embodiment of the
present disclosure; and
[0027] FIG. 6 is a schematic cross-sectional view of a connecting
joint in a second embodiment of the present disclosure.
[0028] In the drawings, 1 refers to a connecting tube; 11 refers to
a second tube connecting section; 12 refers to a first tube
connecting section; 13 refers to an annular connecting plate; 111
refers to a first annular groove; 112 refers to a chamfer; 113
refers to a convex tooth; 121 refers to a second annular groove;
131 refers to a first end face; 2 refers to a first compression
sleeve; 21 refers to a bent section; 22 refers to an observation
hole; 3 refers to a second tube or a plastic tube; 4 refers to a
first tube or a metal tube; 5 refers to a compression tool; 6
refers to a first insertion hole; 7 refers to a second compression
sleeve; and 8 refers to a second insertion hole.
DETAILED DESCRIPTION
[0029] The specific implementations of the present disclosure are
described in more detail below with reference to the accompanying
drawings and embodiments. The following embodiments are intended to
illustrate the present disclosure, rather than to limit the scope
of the present disclosure.
[0030] Referring to FIG. 1 to FIG. 5, a connecting joint for
connecting a first tube 4 and a second tube 3 provided by a first
embodiment of the present disclosure is shown. In the present
embodiment, the first tube 4 is a metal tube 4, and the second tube
3 is a plastic tube 3. The connecting joint includes a connecting
tube 1 and a first compression sleeve 2. The connecting tube 1
includes a first tube connecting section 12 and a second tube
connecting section 11 which are communicated. The first tube
connecting section 12 is used to connect a metal tube 4, and the
second tube connecting section 11 is used to connect a plastic tube
3. Preferably, the first tube connecting section 12 is arranged
coaxially with the second tube connecting section 11. In other
embodiments, there may be a certain angle between the first tube
connecting section 12 and the second tube connecting section
11.
[0031] An annular connecting plate 13 is arranged between the first
tube connecting section 12 and the second tube connecting section
11. Preferably, an inner diameter of the first tube connecting
section 12 is greater than an inner diameter of the second tube
connecting section 11, the first tube connecting section 12 is
hermetically connected with the second tube connecting section 11
through the annular connecting plate 13, and the metal tube 4 is
adapted to be nested in the first tube connecting section 12. In
other implementations, the inner diameter of the first tube
connecting section 12 may be equal to or smaller than the inner
diameter of the second tube connecting section 11.
[0032] The first compression sleeve 2 is sleeved on the second tube
connecting section 11, and a first insertion hole 6 with an annular
cross-section for the plastic tube 3 to be inserted into is formed
between an inner wall of the first compression sleeve 2 and an
outer wall of the second tube connecting section 11. A first
annular groove 111 is formed in an outer surface of one end of the
second tube connecting section 11 close to the annular connecting
plate 13, and an end portion of one end of the first compression
sleeve 2 close to the annular connecting plate 13 is bent toward
the second tube connecting section 11 and inserted into the first
annular groove 111. As shown in FIG. 2, a bent section 21 arranged
at an end of the first compression sleeve 2 is inserted into the
first annular groove 111. In the present embodiment, an outer
diameter of the first tube connecting section 12 may be greater
than an outer diameter of the second tube connecting section 11. In
other embodiments, the outer diameter of the first tube connecting
section 12 may also be set to be less than the outer diameter of
the second tube connecting section 11, which is not limited.
[0033] During connection of the metal tube 4 and the plastic tube 3
by the connecting joint of the present embodiment, firstly, the
metal tube 4 is inserted into the first tube connecting section 12,
and the metal tube 4 extends into the end portion of the first tube
connecting section 12 to abut against the end face of the annular
connecting plate 13. Then, the metal tube 4 is welded with the
first tube connecting section 12 through a high-temperature welding
process. After a welding area is cooled, the plastic tube 3 is
inserted into the first insertion hole with the annular
cross-section formed between the first compression sleeve 2 and the
second tube connecting section 11. Then the middle part of the
first compression sleeve 2 is deformed permanently toward the
plastic tube 3 by a compression tool 5 and the inner wall of the
first compression sleeve 2 is pressed against the outer wall of the
plastic tube 3, thereby realizing fixed connection of the first
compression sleeve 2 and the plastic tube 3. The compression tool 5
may be a vise. Since one end of the first compression sleeve 2 is
inserted into the first annular groove 111, the second tube
connecting section 11, the plastic tube 3 and the first compression
sleeve 2 are compressed with each other, thereby realizing relative
fixed connection of the first compression sleeve 2 and the second
tube connecting section 11, and further realizing the connection of
the metal tube 4 and the plastic tube 3. Compared with the prior
art, such a connecting joint can simplify the connection of the
connecting joint and the plastic tube 3, further simplify the
connection of the metal tube 4 and the plastic tube 3, and save
installation time and is convenient to install.
[0034] As can be seen from the figures, the bent section 21 of the
first compression sleeve 2 is inserted into the first annular
groove 111, and the shape of the bent section 21 may be preformed.
The bent section 21 is bent toward the inside of the first
compression sleeve 2, forming a hook. In the process of being
nested in the second tube connecting section 11, the bent section
21 is inserted into the first annular groove 111 through its own
elastic deformation. After the bent section 21 is inserted in
place, the shape recovers, so that the first compression sleeve 2
is installed on the second tube connecting section 11 and is not
easy to fall off. The first compression sleeve 2 is preferably a
metal part which can withstand high temperatures, so that during
welding operation of the metal tube 4 and the first tube connecting
section 12, it is not necessary to deliberately remove the first
compression sleeve 2 from the second tube connecting section
11.
[0035] As can be seen from FIG. 5, a first end face 131 of the
annular connecting plate 13 close to the second tube connecting
section 11 forms at least a part of one side wall of the first
annular groove 111, which facilitates the formation of the first
annular groove 111. In addition, when the plastic tube 3 needs to
be connected, the bent section 21 of the first compression sleeve 2
may abut against the first end face 131 of the annular connecting
plate 13, thereby facilitating reliable positioning of the first
compression sleeve 2.
[0036] Further, a chamfer 112 is formed in an outer surface of an
end portion of one end of the first compression sleeve 2 deviating
from the annular connecting plate 13. In such arrangement, the
second tube connecting section 11 may be easily inserted into the
inside of the plastic tube 3, and the plastic tube 3 may be easily
inserted into the first insertion hole with the annular
cross-section formed between the first compression sleeve 2 and the
second tube connecting section 11.
[0037] Further, a convex tooth 113 or a plurality of convex teeth
113 uniformly arranged is/are formed in an outer surface of the
second tube connecting section 11. In this way, after the first
compression sleeve 2 is compressed, the plastic tube 3 is in
concave and convex fit with the convex tooth 113, which can enhance
the resistance of plastic tube 3 to be pulled out from the second
tube connecting section 11 to ensure the stability of the
connection.
[0038] Further, an inner diameter of a middle part of the first
compression sleeve 2 is less than an inner diameter of either end
of the first compression sleeve, thereby facilitating the
compression of the first compression sleeve 2 toward the plastic
tube 3. An observation hole 22 is formed in a surface of the end of
the first compression sleeve 2 close to the annular connecting
plate 13. Preferably, 2, 3 or a plurality of observation holes 22
are formed, and the plurality of observation holes 22 are in ring
array arrangement in a circumferential direction of the first
compression sleeve 2. In such arrangement, it is easy to observe
whether the plastic tube 3 is inserted in place. In addition, in
the present embodiment, the first tube connecting section 12, the
annular connecting plate 13 and the second tube connecting section
11 are integrally formed.
[0039] The present disclosure further provides a second embodiment
which is not shown. The main difference between the second
embodiment and the above-mentioned first embodiment is that the
first tube 4 and the second tube 3 are both plastic tubes, and the
connecting joint is used to connect the first tube 4 and the second
tube 3. Preferably, the structures of the first tube connecting
section 12 and the second tube connecting section 11 are
symmetrical with respect to the annular connecting plate 13. In
other embodiments, the structures of the first tube connecting
section 12 and the second tube connecting section 11 may not be
symmetrical with respect to the annular connecting plate 13. A
second compression sleeve is further sleeved on the first tube
connecting section 12, and the second compression sleeve is
preferably a metal part.
[0040] Specifically, as shown in FIG. 6, the second compression
sleeve 7 is sleeved on the first tube connecting section 12, a
second insertion hole 8 with an annular cross-section for the first
tube 4 to be inserted into is formed between an inner wall of the
second compression sleeve 7 and an outer wall of the first tube
connecting section 12, a second annular groove 121 is formed in an
outer surface of one end of the first tube connecting section 12
close to the annular connecting plate 13, and an end portion of one
end of the second compression sleeve 7 close to the annular
connecting plate 13 is bent toward the first tube connecting
section 12 and inserted into the second annular groove 121. In the
present embodiment, the operation of installing the first tube 4 in
the first tube connecting section 12 is the same as that of
installing the second tube 3 in the second tube connecting section
11 in the first embodiment, which is not repeated here.
[0041] Preferably, a second end face of the annular connecting
plate 13 close to the first tube connecting section 12 forms at
least a part of one side wall of the second annular groove 121,
which facilitates the formation of the second annular groove 121.
In addition, when the first tube 4 needs to be connected, a bent
section of the second compression sleeve 7 may abut against a
second end face of the annular connecting plate 13, thereby
facilitating reliable positioning of the second compression sleeve
7. Preferably, the structures of the second compression sleeve 7
and the first compression sleeve 2 are roughly symmetrical with
respect to the annular connecting plate 13. In other embodiments,
the structures of the second compression sleeve 7 and the first
compression sleeve 2 may not be symmetrical with respect to the
annular connecting plate 13.
[0042] It should be noted that in the description of the present
disclosure, the terms such as "center", "longitudinal",
"transverse", "upper", "lower", "front", "rear", "left", "right",
"vertical", "horizontal", "top", "bottom", "inside" and "outside"
indicate the orientation or position relationships based on the
drawings. These terms are merely intended to facilitate description
of the present disclosure and simplify the description, rather than
to indicate or imply that the mentioned device or element must have
a specific orientation and must be constructed and operated in a
specific orientation. Therefore, these terms should not be
construed as a limitation to the present disclosure. Moreover, the
terms such as "first", "second", and "third" are used only for the
purpose of description and are not intended to indicate or imply
relative importance.
[0043] In the description of the present disclosure, it should be
noted that, unless otherwise clearly specified, meanings of terms
"install", "connected with", and "connected to" should be
understood in a broad sense. For example, the connection may be a
fixed connection, a removable connection, or an integral
connection; may be a mechanical connection or an electrical
connection; may be a direct connection or an indirect connection by
an intermediate medium; or may be intercommunication between two
components. Persons of ordinary skill in the art may understand
specific meanings of the foregoing terms in the present disclosure
based on a specific situation.
[0044] The above merely describes preferred implementations of the
present disclosure. It should be noted that, several improvements
and replacements may be made by persons of ordinary skill in the
art without departing from the principle of the present disclosure,
and these improvements and replacements should also be considered
within the protection scope of the present disclosure.
* * * * *